Disable DAGCombine's alignment inference in "fast" codegen mode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55059 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index cb71f1a..f38b2eb 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -5369,9 +5369,9 @@
   // Run the DAG combiner in pre-legalize mode.
   if (TimePassesIsEnabled) {
     NamedRegionTimer T("DAG Combining 1", GroupName);
-    DAG.Combine(false, *AA);
+    DAG.Combine(false, *AA, Fast);
   } else {
-    DAG.Combine(false, *AA);
+    DAG.Combine(false, *AA, Fast);
   }
   
   DOUT << "Optimized lowered selection DAG:\n";
@@ -5413,9 +5413,9 @@
   // Run the DAG combiner in post-legalize mode.
   if (TimePassesIsEnabled) {
     NamedRegionTimer T("DAG Combining 2", GroupName);
-    DAG.Combine(true, *AA);
+    DAG.Combine(true, *AA, Fast);
   } else {
-    DAG.Combine(true, *AA);
+    DAG.Combine(true, *AA, Fast);
   }
   
   DOUT << "Optimized legalized selection DAG:\n";